drivers/video/exynos/exynos_mipi_dsi.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright (C) 2012 Samsung Electronics
   4  *
   5  * Author: InKi Dae <inki.dae@samsung.com>
   6  * Author: Donghwa Lee <dh09.lee@samsung.com>
   7  */
   8
   9 #include <common.h>
  10 #include <log.h>
  11 #include <malloc.h>
  12 #include <fdtdec.h>
  13 #include <asm/global_data.h>
  14 #include <dm/devres.h>
  15 #include <linux/libfdt.h>
  16 #include <linux/compat.h>
  17 #include <linux/err.h>
  18 #include <asm/arch/dsim.h>
  19 #include <asm/arch/mipi_dsim.h>
  20 #include <asm/arch/power.h>
  21 #include <asm/arch/cpu.h>
  22 #include <asm/arch/clk.h>
  23
  24 #include "exynos_mipi_dsi_lowlevel.h"
  25 #include "exynos_mipi_dsi_common.h"
  26
  27 #define master_to_driver(a)     (a->dsim_lcd_drv)
  28 #define master_to_device(a)     (a->dsim_lcd_dev)
  29
  30 DECLARE_GLOBAL_DATA_PTR;
  31
  32 struct mipi_dsim_ddi {
  33         int                             bus_id;
  34         struct list_head                list;
  35         struct mipi_dsim_lcd_device     *dsim_lcd_dev;
  36         struct mipi_dsim_lcd_driver     *dsim_lcd_drv;
  37 };
  38
  39 static LIST_HEAD(dsim_ddi_list);
  40 static LIST_HEAD(dsim_lcd_dev_list);
  41
  42 int exynos_mipi_dsi_register_lcd_device(struct mipi_dsim_lcd_device *lcd_dev)
  43 {
  44         struct mipi_dsim_ddi *dsim_ddi;
  45
  46         if (!lcd_dev) {
  47                 debug("mipi_dsim_lcd_device is NULL.\n");
  48                 return -EFAULT;
  49         }
  50
  51         if (!lcd_dev->name) {
  52                 debug("dsim_lcd_device name is NULL.\n");
  53                 return -EFAULT;
  54         }
  55
  56         dsim_ddi = kzalloc(sizeof(struct mipi_dsim_ddi), GFP_KERNEL);
  57         if (!dsim_ddi) {
  58                 debug("failed to allocate dsim_ddi object.\n");
  59                 return -EFAULT;
  60         }
  61
  62         dsim_ddi->dsim_lcd_dev = lcd_dev;
  63
  64         list_add_tail(&dsim_ddi->list, &dsim_ddi_list);
  65
  66         return 0;
  67 }
  68
  69 struct mipi_dsim_ddi
  70         *exynos_mipi_dsi_find_lcd_device(struct mipi_dsim_lcd_driver *lcd_drv)
  71 {
  72         struct mipi_dsim_ddi *dsim_ddi;
  73         struct mipi_dsim_lcd_device *lcd_dev;
  74
  75         list_for_each_entry(dsim_ddi, &dsim_ddi_list, list) {
  76                 lcd_dev = dsim_ddi->dsim_lcd_dev;
  77                 if (!lcd_dev)
  78                         continue;
  79
  80                 if (lcd_drv->id >= 0) {
  81                         if ((strcmp(lcd_drv->name, lcd_dev->name)) == 0 &&
  82                                         lcd_drv->id == lcd_dev->id) {
  83                                 /**
  84                                  * bus_id would be used to identify
  85                                  * connected bus.
  86                                  */
  87                                 dsim_ddi->bus_id = lcd_dev->bus_id;
  88
  89                                 return dsim_ddi;
  90                         }
  91                 } else {
  92                         if ((strcmp(lcd_drv->name, lcd_dev->name)) == 0) {
  93                                 /**
  94                                  * bus_id would be used to identify
  95                                  * connected bus.
  96                                  */
  97                                 dsim_ddi->bus_id = lcd_dev->bus_id;
  98
  99                                 return dsim_ddi;
 100                         }
 101                 }
 102
 103                 kfree(dsim_ddi);
 104                 list_del(&dsim_ddi_list);
 105         }
 106
 107         return NULL;
 108 }
 109
 110 int exynos_mipi_dsi_register_lcd_driver(struct mipi_dsim_lcd_driver *lcd_drv)
 111 {
 112         struct mipi_dsim_ddi *dsim_ddi;
 113
 114         if (!lcd_drv) {
 115                 debug("mipi_dsim_lcd_driver is NULL.\n");
 116                 return -EFAULT;
 117         }
 118
 119         if (!lcd_drv->name) {
 120                 debug("dsim_lcd_driver name is NULL.\n");
 121                 return -EFAULT;
 122         }
 123
 124         dsim_ddi = exynos_mipi_dsi_find_lcd_device(lcd_drv);
 125         if (!dsim_ddi) {
 126                 debug("mipi_dsim_ddi object not found.\n");
 127                 return -EFAULT;
 128         }
 129
 130         dsim_ddi->dsim_lcd_drv = lcd_drv;
 131
 132         debug("registered panel driver(%s) to mipi-dsi driver.\n",
 133                 lcd_drv->name);
 134
 135         return 0;
 136
 137 }
 138
 139 struct mipi_dsim_ddi
 140         *exynos_mipi_dsi_bind_lcd_ddi(struct mipi_dsim_device *dsim,
 141                         const char *name)
 142 {
 143         struct mipi_dsim_ddi *dsim_ddi;
 144         struct mipi_dsim_lcd_driver *lcd_drv;
 145         struct mipi_dsim_lcd_device *lcd_dev;
 146
 147         list_for_each_entry(dsim_ddi, &dsim_ddi_list, list) {
 148                 lcd_drv = dsim_ddi->dsim_lcd_drv;
 149                 lcd_dev = dsim_ddi->dsim_lcd_dev;
 150                 if (!lcd_drv || !lcd_dev)
 151                         continue;
 152
 153                 debug("lcd_drv->id = %d, lcd_dev->id = %d\n",
 154                                         lcd_drv->id, lcd_dev->id);
 155
 156                 if ((strcmp(lcd_drv->name, name) == 0)) {
 157                         lcd_dev->master = dsim;
 158
 159                         dsim->dsim_lcd_dev = lcd_dev;
 160                         dsim->dsim_lcd_drv = lcd_drv;
 161
 162                         return dsim_ddi;
 163                 }
 164         }
 165
 166         return NULL;
 167 }
 168
 169 /* define MIPI-DSI Master operations. */
 170 static struct mipi_dsim_master_ops master_ops = {
 171         .cmd_write                      = exynos_mipi_dsi_wr_data,
 172         .get_dsim_frame_done            = exynos_mipi_dsi_get_frame_done_status,
 173         .clear_dsim_frame_done          = exynos_mipi_dsi_clear_frame_done,
 174 };
 175
 176 int exynos_mipi_dsi_init(struct exynos_platform_mipi_dsim *dsim_pd)
 177 {
 178         struct mipi_dsim_device *dsim;
 179         struct mipi_dsim_config *dsim_config;
 180         struct mipi_dsim_ddi *dsim_ddi;
 181
 182         dsim = kzalloc(sizeof(struct mipi_dsim_device), GFP_KERNEL);
 183         if (!dsim) {
 184                 debug("failed to allocate dsim object.\n");
 185                 return -EFAULT;
 186         }
 187
 188         /* get mipi_dsim_config. */
 189         dsim_config = dsim_pd->dsim_config;
 190         if (dsim_config == NULL) {
 191                 debug("failed to get dsim config data.\n");
 192                 return -EFAULT;
 193         }
 194
 195         dsim->pd = dsim_pd;
 196         dsim->dsim_config = dsim_config;
 197         dsim->master_ops = &master_ops;
 198
 199         /* bind lcd ddi matched with panel name. */
 200         dsim_ddi = exynos_mipi_dsi_bind_lcd_ddi(dsim, dsim_pd->lcd_panel_name);
 201         if (!dsim_ddi) {
 202                 debug("mipi_dsim_ddi object not found.\n");
 203                 return -ENOSYS;
 204         }
 205         if (dsim_pd->lcd_power)
 206                 dsim_pd->lcd_power();
 207
 208         if (dsim_pd->mipi_power)
 209                 dsim_pd->mipi_power();
 210
 211         /* phy_enable(unsigned int dev_index, unsigned int enable) */
 212         if (dsim_pd->phy_enable)
 213                 dsim_pd->phy_enable(0, 1);
 214
 215         set_mipi_clk();
 216
 217         exynos_mipi_dsi_init_dsim(dsim);
 218         exynos_mipi_dsi_init_link(dsim);
 219         exynos_mipi_dsi_set_hs_enable(dsim);
 220
 221         /* set display timing. */
 222         exynos_mipi_dsi_set_display_mode(dsim, dsim->dsim_config);
 223
 224         /* initialize mipi-dsi client(lcd panel). */
 225         if (dsim_ddi->dsim_lcd_drv && dsim_ddi->dsim_lcd_drv->mipi_panel_init) {
 226                 dsim_ddi->dsim_lcd_drv->mipi_panel_init(dsim);
 227                 dsim_ddi->dsim_lcd_drv->mipi_display_on(dsim);
 228         }
 229
 230         debug("mipi-dsi driver(%s mode) has been probed.\n",
 231                 (dsim_config->e_interface == DSIM_COMMAND) ?
 232                         "CPU" : "RGB");
 233
 234         return 0;
 235 }
 236
 237 int exynos_dsim_config_parse_dt(const void *blob, struct mipi_dsim_config *dt,
 238                                 struct mipi_dsim_lcd_device *lcd_dt)
 239 {
 240         int node;
 241
 242         node = fdtdec_next_compatible(blob, 0, COMPAT_SAMSUNG_EXYNOS_MIPI_DSI);
 243         if (node <= 0) {
 244                 printf("exynos_mipi_dsi: Can't get device node for mipi dsi\n");
 245                 return -ENODEV;
 246         }
 247
 248         dt->e_interface = fdtdec_get_int(blob, node,
 249                                 "samsung,dsim-config-e-interface", 0);
 250
 251         dt->e_virtual_ch = fdtdec_get_int(blob, node,
 252                                 "samsung,dsim-config-e-virtual-ch", 0);
 253
 254         dt->e_pixel_format = fdtdec_get_int(blob, node,
 255                                 "samsung,dsim-config-e-pixel-format", 0);
 256
 257         dt->e_burst_mode = fdtdec_get_int(blob, node,
 258                                 "samsung,dsim-config-e-burst-mode", 0);
 259
 260         dt->e_no_data_lane = fdtdec_get_int(blob, node,
 261                                 "samsung,dsim-config-e-no-data-lane", 0);
 262
 263         dt->e_byte_clk = fdtdec_get_int(blob, node,
 264                                 "samsung,dsim-config-e-byte-clk", 0);
 265
 266         dt->hfp = fdtdec_get_int(blob, node,
 267                                 "samsung,dsim-config-hfp", 0);
 268
 269         dt->p = fdtdec_get_int(blob, node,
 270                                           "samsung,dsim-config-p", 0);
 271         dt->m = fdtdec_get_int(blob, node,
 272                                           "samsung,dsim-config-m", 0);
 273         dt->s = fdtdec_get_int(blob, node,
 274                                           "samsung,dsim-config-s", 0);
 275
 276         dt->pll_stable_time = fdtdec_get_int(blob, node,
 277                                 "samsung,dsim-config-pll-stable-time", 0);
 278
 279         dt->esc_clk = fdtdec_get_int(blob, node,
 280                                 "samsung,dsim-config-esc-clk", 0);
 281
 282         dt->stop_holding_cnt = fdtdec_get_int(blob, node,
 283                                 "samsung,dsim-config-stop-holding-cnt", 0);
 284
 285         dt->bta_timeout = fdtdec_get_int(blob, node,
 286                                 "samsung,dsim-config-bta-timeout", 0);
 287
 288         dt->rx_timeout = fdtdec_get_int(blob, node,
 289                                 "samsung,dsim-config-rx-timeout", 0);
 290
 291         lcd_dt->name = fdtdec_get_config_string(blob,
 292                                 "samsung,dsim-device-name");
 293
 294         lcd_dt->id = fdtdec_get_int(blob, node,
 295                                 "samsung,dsim-device-id", 0);
 296
 297         lcd_dt->bus_id = fdtdec_get_int(blob, node,
 298                                 "samsung,dsim-device-bus_id", 0);
 299
 300         lcd_dt->reverse_panel = fdtdec_get_int(blob, node,
 301                                 "samsung,dsim-device-reverse-panel", 0);
 302
 303         return 0;
 304 }
 305
 306 void exynos_init_dsim_platform_data(vidinfo_t *vid)
 307 {
 308         static struct mipi_dsim_config dsim_config_dt;
 309         static struct exynos_platform_mipi_dsim dsim_platform_data_dt;
 310         static struct mipi_dsim_lcd_device mipi_lcd_device_dt;
 311
 312         if (exynos_dsim_config_parse_dt(gd->fdt_blob, &dsim_config_dt,
 313                                         &mipi_lcd_device_dt))
 314                 debug("Can't get proper dsim config.\n");
 315
 316         strcpy(dsim_platform_data_dt.lcd_panel_name, mipi_lcd_device_dt.name);
 317         dsim_platform_data_dt.dsim_config = &dsim_config_dt;
 318         dsim_platform_data_dt.mipi_power = mipi_power;
 319         dsim_platform_data_dt.phy_enable = set_mipi_phy_ctrl;
 320         dsim_platform_data_dt.lcd_panel_info = (void *)vid;
 321
 322         mipi_lcd_device_dt.platform_data = (void *)&dsim_platform_data_dt;
 323         exynos_mipi_dsi_register_lcd_device(&mipi_lcd_device_dt);
 324
 325         vid->dsim_platform_data_dt = &dsim_platform_data_dt;
 326 }